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Juniper

Juniper QFX5120-48Y-D-AFI2 | QFX5120 48-Port 25GbE Switch, 8x 100G, DC PSUs, Airflow In

Juniper QFX5120-48Y-D-AFI2 | QFX5120 48-Port 25GbE Switch, 8x 100G, DC PSUs, Airflow In

QFX5120-48Y-D-AFI2

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Description

The Juniper QFX5120-48Y is a 1U high-density data centre top-of-rack switch delivering 4 Tbps switching capacity and sub-microsecond latency across 48 x 25GbE SFP28 ports and 8 x 100GbE QSFP28 uplinks. Built on the Broadcom Tomahawk 3 ASIC, it supports advanced EVPN-VXLAN overlay architectures, Virtual Chassis stacking, and 100% wire-speed throughput — making it ideal for leaf-and-spine data centre deployments and enterprise campus distribution. This DC-powered, Airflow In (AFI2) variant features port-side air intake (front-to-back cooling) for cold-aisle configurations, with redundant DC PSUs and fans ensuring high availability.

The QFX5120-48Y ships with base software features included and supports Juniper Apstra and Mist cloud onboarding for simplified operations. Rich Layer 2/Layer 3 capabilities include 64-way ECMP, 80 LAG groups, 128,000 IPv4 routes, and up to 16,000 VTEPs. Real-time streaming telemetry via the Junos Telemetry Interface (JTI) enables proactive network visibility at scale. Available now at iptrading.com.au — competitive prices and local support.

Features

- Advanced EVPN-VXLAN support for modern overlay/underlay network architectures
- Layer 3 gateway for routing between virtualised and bare-metal servers
- Optimised for leaf-and-spine data centre and campus distribution deployments
- Junos Telemetry Interface (JTI) for real-time streaming telemetry and performance monitoring
- Virtual Chassis support for multi-switch logical stacking and simplified management
- 100% wire-speed throughput across all 48 SFP28 and 8 QSFP28 ports
- 64-way ECMP and up to 80 LAG groups for resilient load balancing
- QSFP28 breakout scales to 80 x 25GbE or 80 x 10GbE connections
- Redundant DC power supplies and hot-swappable fans for high availability
- Juniper Apstra and Mist cloud onboarding for intent-based and zero-touch operations
- Rich base software feature set included — no additional licence required for core L2/L3
- Front-to-back (Airflow In) cooling for cold-aisle data centre containment

Warranty

Juniper products are supplied with standard manufacturer warranty terms, which vary by product and can range from 1 year through to limited lifetime coverage. IP Trading can also provide Juniper J-Care warranty and support extensions for customers who need longer coverage or enhanced support options. https://support.juniper.net/support/warranty/

All technical data should be verified on the manufacturer data sheets.

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Technical Specifications

FAQs

Datasheet

Technical Specifications

- 48 x 1/10/25GbE SFP28 ports
- 8 x 40/100GbE QSFP28 uplink ports (breakout capable to 4x10/25GbE per port)
- Switching capacity: 4 Tbps full duplex
- Forwarding rate: 3 Bpps
- Latency: 0.7 µs (L2) / 0.8 µs (L3)
- ASIC: Broadcom Tomahawk 3
- Buffer memory: 32 GB
- MAC address table: 288,000 entries
- VLANs: 4,096
- IPv4 routes: 128,000 | IPv6 routes: 64,000
- EVPN-VXLAN: Up to 16,000 VTEPs
- Power supply: Redundant DC PSUs
- Airflow: Front-to-back / Port-side intake (Airflow In / AFI2)
- Form factor: 1U rack-mount
- Dimensions: 1.72 x 17.36 x 20.48 in
- Gross weight: 32.37 lbs
- Management: 1 x 10/100/1000BASE-T RJ-45, 1 x USB 2.0
- Country of Origin: Vietnam

FAQs

Q: What is the difference between the AFI2 (Airflow In) and AFO (Airflow Out) variants of the QFX5120-48Y?
A: The AFI2 variant uses front-to-back (port-side intake) airflow, drawing cool air in from the port side — ideal for cold-aisle containment deployments. The AFO variant uses back-to-front airflow for hot-aisle containment. Selecting the correct airflow direction is critical for data centre cooling efficiency.

Q: Does the QFX5120-48Y-D-AFI2 support EVPN-VXLAN for modern data centre fabrics?
A: Yes. The QFX5120-48Y supports advanced EVPN-VXLAN, enabling overlay and underlay network architectures with up to 16,000 VTEPs. It is purpose-built for leaf-and-spine data centre deployments and can also serve as a Layer 3 gateway between virtualised and bare-metal servers.

Q: Can I stack multiple QFX5120-48Y switches together?
A: Yes. The QFX5120-48Y supports Juniper Virtual Chassis, allowing multiple switches to be logically managed as a single device. This simplifies management and increases resilience in campus distribution and data centre environments.

Q: What software is included with the QFX5120-48Y-D-AFI2?
A: This SKU ships with base software features included, covering a rich Layer 2 and Layer 3 feature set. It also supports Juniper Apstra intent-based networking and Mist cloud onboarding for zero-touch provisioning and AI-driven operations.

Q: Can I purchase the Juniper QFX5120-48Y-D-AFI2 in Australia?
A: Yes. The QFX5120-48Y-D-AFI2 is available for purchase in Australia through iptrading.com.au. IP Trading offers competitive pricing and local B2B support for Juniper data centre switching products.

Q: How many 10GbE or 25GbE ports can I achieve with QSFP28 breakout on the QFX5120-48Y?
A: The 8 x QSFP28 uplink ports can each break out into 4 x 10/25GbE connections, delivering up to 32 additional 10GbE or 25GbE ports. Combined with the 48 native SFP28 ports, the switch can scale to 80 x 25GbE or 80 x 10GbE total downlink connections.

Datasheet

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